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Note 2 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Detail) (USD $) | 1 Months Ended | 3 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 5 Months Ended | 12 Months Ended |  | 12 Months Ended
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Sep. 30, 2011 | Dec. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 RHB [Member] | Dec. 31, 2012 JBC [Member] | Dec. 31, 2012 SWR, Inc. [Member[ | Apr. 27, 2012 RHB [Member] Buy [Member] | Apr. 27, 2012 RHB [Member] | Dec. 31, 2012 RHB [Member] | Dec. 31, 2011 Minimum [Member] RHB [Member] | Dec. 31, 2012 Minimum [Member] JBC [Member] | Dec. 31, 2012 Minimum [Member] RLW [Member] | Dec. 31, 2011 Maximum [Member] RHB [Member] | Aug. 31, 2011 Maximum [Member] JBC [Member] | Dec. 31, 2012 Maximum [Member] RLW [Member] | Oct. 31, 2007 RHB [Member] | Dec. 31, 2012 RHB [Member] | Dec. 31, 2011 RHB [Member] | Mar. 17, 2011 RHB [Member] | Dec. 31, 2012 Contracts Assumed [Member] | Aug. 31, 2012 JBC [Member] | Aug. 31, 2011 JBC [Member] | Dec. 31, 2011 JBC [Member] | Dec. 31, 2012 JBC [Member] | Dec. 31, 2012 RLW [Member] | Dec. 31, 2011 RLW [Member] | Dec. 31, 2010 RLW [Member] | Dec. 31, 2011 Myers [Member] | Dec. 31, 2012 Myers [Member] | Dec. 31, 2012 RLW [Member] | Dec. 31, 2011 RLW [Member] | Dec. 31, 2012 RHB [Member] | Dec. 31, 2012 Myers [Member]
Number of Assumed Construction Contracts |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue |  |  |  |  |  |  |  | $ 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-Compete Agreement Term |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Cost Of Acquired Entity Repurchase Percentage |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Pre-Tax Adjustment |  |  |  |  |  | 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 233,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  | 80.00% |  |  |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Deferred Tax Assets, Noncurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 360,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 26,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 152,000 |  |  |  |  |  |  |  |  |
Business Acquisition Additional Price Payments Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
EBITDA Earn-Out Increase Floor |  |  |  |  |  |  | 5,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Forcasted EBITDA Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  | 205.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Discounted Present Value of Additional Purchase Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,400,000 |  | 2,300,000 |  |  |  |  |  |  |  |
Business Acquisition Undiscounted Earn-Out Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,400,000 |  |  |  |  |  |  |  |  |
Business Acquisition Undiscounted Earn-Out Liability Increase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,600,000 |  |  |  |  |  |  |  |  |
BusinessAcquisitionPurchasePriceAllocBusinessAcquisitionPurchasePriceAllocationGoodwillDBusiness Acquisition Purchase Price Allocation Goodwill Deductible TermeductibleTermationGoodwillDeductibleTerm |  |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  | 15 years |  |  |  |  |
Fair Value of Assets Acquired |  |  | 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 98.00% |  | 98.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |
Business Acquisition, Cost of Acquired Entity, Transaction Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 128,000 |  |  |  |  |
Business Acquisition Remaining Percentage Of Voting Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 91.67% |  | 8.33% |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |
Business Acquisition Purchase Price Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |
Business Acquisition Purchase Price Multiplier |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  | 4.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 993,000 | 881,000 | 807,000 |  |  |  |  |  |
Increase (Decrease) in Put/Call Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,800,000 | 1,300,000 |  |
Other Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 | 500,000 |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  |  |  |  |  | 8.33% |  |  |  |  |  |  |  |  | 8.33% |  |  |  |  |  | 20.00% |  |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,100,000 |  |  |  |  |  |  |  |
Business Acquisition Additional Price Payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 568,000 |  |  |  |  |  |  |  |
Business Acquisition Purchase Price Increase |  |  |  |  |  |  |  |  |  |  |  | 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Purchase Settled |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,200,000 |  |  |  |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Change in Redemption Value | 8,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extraordinary Item, Gain (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest (in Dollars) |  | 41,800,000 | 18,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  | (18,009,000) | (1,196,000) | (7,137,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000,000 |  | 1,900,000 |
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,700,000 |  |  | $ 1,100,000

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